「Special Topics On Engineering For Synthesis And Design A
‐Computer Control for Mechatronic Systems」*
Date: November 7 (Wednesday), 2007
Place: Room 12-102
Nanoscale Servo Control
----- Advanced Control Technologies for Hard Disk Drives -----
Professor Mitsuo Hirata
The demand for high-precision and high-speed control has received great attention
due to the recent progress of information devices such as hard disk drives, next
generation DVDs. Nowadays the required control accuracy of these systems is in
nanoscale order. To achieve these requirements, many efforts have been paid to improve
the control accuracy and the access speed.
In this seminar, advanced control methods for hard disk drives will be presented. The
topics include a robust controller design against plant uncertainties and various
disturbances, a vibration minimized trajectory design for mechanical systems that
include vibration mode at high frequency, the sampled data multi-rate controller design.
A hard disk benchmark problem that is developed by control engineers of hard disk
drive industry and academia is also introduced. These control approaches can be applied
to any other mechatronic systems.
Mitsuo Hirata was bone in Tokyo, Japan in 1969. He received B.E., M.E., and Ph.D
degrees from Chiba University in 1991, 1993 and 1996 respectively. From 1996 to 2004,
he was a Research Associate at the Department of Electronics and Mechanical
Engineering, Chiba University. Since June 2004, he has been with the Department of
Electrical and Electronic Engineering, Utsunomiya University, where he is currently an
Associate Professor. From 2002 to 2003, he was a Visiting Scholar at the Department of
Mechanical Engineering, University of California at Berkeley. His research and
educational interests are robust control, sampled-data control, nanoscale servo control,
and their applications to various industrial systems, including advanced control of hard
disk drives. He is an author of "Control Systems Design using MATLAB" (TDU Press
1998), and "Nanoscale Servo Control" (TDU Press 2007).
* This seminar is given as a part of a special topic graduate course, but we welcome the participation
of faculty members and students interested in dynamic systems and control.